Aquarium



FIG. 1 is a perspective view showing the design of an aquarium;

FIG. 2 is a top plan view of the aquarium shown in FIG. 1;

FIG. 3 is a bottom plan view of the aquarium shown in FIG. 1;

FIG. 4 is a right side elevational view of the aquarium shown in FIG. 1;the left side elevational view thereof being a mirror image; and,

FIG. 5 is a front elevational view of the aquarium shown in FIG. 1; therear elevational view thereof being a mirror image.

The ornamental design for an aquarium, as shown and described.